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(No Model.) I v Y C. S. RUBI'.

' HARROW. No. 450,088. Patented Apr. 7., 1891.

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UNITED STATES PATENT OFFICE.

CHARLES S. RUEF, OF DIXON, ILLINOIS, ASSIGNOR TO THE GRAND DETOUR PLOIV COMPANY, OF SAME PLACE.

HARROW.

SPECIFICATION forming part of Letters Patent No. 450,088, dated April 7, 1891.

Application iiled November 18, 1889. Serial No. 330,669. (No model.)

To all whmn it may concern:

Be it known that I, CHARLES S. RUEE, a citizen of the United States, residing at Dixon, in the county of Lee and State of Illinois, have invented certain new and useful Improvements in Harrows, of which the following is a specification.

My invention has more special reference to iron or steel harrows in which the cross-beams to which contain and carry the harrow-teeth are of an angular conformation; and the object of my invention is', iirst, to provide a rigid and adjustable seat for the barrow-teeth; second, to afford facilities for the vertical adj ustment of said teeth, and, third, to thereby re-enforce the shallow opening in the horizontal portion of the bar and assist said opening to hold the teeth from casual movement. I attain these objects by the mechanism herezo-inafter described and illustrated in the accompanying drawings, in which- Figure l is a perspective of a section of a barrow-beam provided with my invention. Fig. 2 is a vertical section in the line x Fig. 3 is a detail of the seat of the harrow-tooth and of the parts employed in holding said tooth adjustably in place.

As my invention is applicable to any form of harrows in which an angular form of beam 3o is employed and the residue of the harrow can be of any of the well-known forms of construction, I do not deem it essential to show or describe the entire implement or any more thereof than will make intelligible the at- 3 5 tachment and operation of my invention.

A is a section of one of the cross-beams, constructed of the vertical front flange B and horizontal and rearwardly-extending flange C.

D is the usual barrow-tooth, which may be in cross-section of an angular, oval, round, or any other conformation. In the construction shown there is exhibited the ordinary rectangular tooth, which is preferably drawn with one of its angles extending forward in the line of draft.

The parts herein shown are exhibited as adapted to a harrow which is drawn with its cross-beams A perpendicular to the line of draft or transversely of the movement of the 5o implement. Therefore the harrow-tooth D is set with its front angle E projected forward in the line of draft and resting against the rear wall of the vert-ical portion B ofthe beam A. A vertical hole F is formed in the horizontal portion C of said beam, of a conformation in cross-section corresponding to the exterior of the upper portion of the tooth D. The front extremity of the hole F is in line with the downward prolongation of the rear wall of the side or upper flange B. Holes G 6o G are formed transversely through the flange B at each side, respectively, of the tooth D a suitable distance above the flange C. A clamp H, preferably of malleable iron, is seated oppositely to the holes G against the rear side of the tooth D, and a staple K, provided with threaded ends L, is passed from the rear over the metallic clamp H and tooth D, with its threads L respectively projected forwardly through the holes G. 7o

Nuts M are screwed upon the threads L against the front wall of the flange B and serve to hold said tooth D rigidly against the adjacent Wall of the iiange B.

The clamp H is provided on its inner surface with a vertical concavity N, of a conformation to iit the exterior of the contiguous portion of the tooth D. The clamp H is further provided on its exterior with a horizontal segmental groove O, adapted to receive the 8o inner half of the contiguous portion of the staple K. The groove'O extends through the sides or Walls of the clamp H, and said groove thereby affords a seat for the compressing contiguous portions of the staple K, and said clamp is held by said seating ofthe staple therein from casual vertical movement.

In constructing harrows out of V-shaped angle-iron, as above described, the rear flange C is very considerably weakened by making go such large holes or openings through it as is necessary for the teeth, and, as this iiange is the main one for giving strength to the beam as the pressure or weight comes upon the other one flatwise, I utilize the clamp H to brace the iange O atthis weakened point, and thus add to the strength of the beam without adding to the thickness of the iron, which would increase the weight and cost of the harrow. To'make the clamp perform this important roo function, I make the end of it flat and at such an angle to the axis of the concavity N for the reception of the tooth as that When it is placed upon the tooth one end of the clamp will fit against the rear flange C above the opening for the tooth, and Will thereby strengthen the flange by preventing its bending or buckling at that point when there is such weight or pressu-re upon it as Would make it do so if the clamp Were not there. By making each end of the clamp alike and making the groove O in the middle of it the clamp is reversible-that is, either end can be made to bear against the flange When in position and help to support and strengthen it.

The advantages of the use of angle-iron in harroWs is Well known, consisting largely in the fact that the parts present their greatest diameter in the lineof pressure, permitting thereby the use of less material, and each flange thereof strengthens the other against torsional strain; but in seating barrow-teeth solely through the thin surface of the horizontal ange it is impracticable to secure strength enough against the leverage of the tooth. It has also heretofore been difficult to afford means for vertical adjustment of the harroW-tooth except by threading the latter and furnishing it with a nut-an expensive method and one of very limited efciency.

The advantages of my invention are that by loosening the nuts M the tooth D can be readily adjusted vertically, or, if broken, can be readily replaced With another tooth; also, the upward flange B is utilized to assist the iange C in holding the tooth in position, and thereby lessen the strain upon the latter flange. The clamp H, being made to conform vinteriorly to the exterior' of the tooth,

to secure by Letters Patent of the United States, is-

In a harroW, the combination, with the V- shaped angleiron beams, the front flange of each of which is provided with the holes G G and the rear flange is provided with the larger holes for the reception of the teeth, of the rearwardly-projecting teeth through the holes in the rear iange and resting between the holes in the front ange, a reversible clamp I-I for each tooth, each end of which is adapted to bear against the rear flange above the opening, and thereby brace it and prevent its bending or buckling, .each of said clamps being also provided with a longitudinal concavity upon its inner surface and a segmental groove upon its exterior at the middle, and a staple for securing the tooth and the clamp to the beam, substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

CHARLES S. RUE F.

Vitnesses:

ALBERT C. EATON, FRED T. HoRsEMAN. 

